我创建了可剔除的可观察数组并添加了以下元素,
define(['ojs/ojcore', 'knockout', 'jquery', 'ojs/ojtable', 'ojs/ojarraytabledatasource', 'ojs/ojrouter'],
function(oj, ko, $) {
function CustomerViewModel() {
var self = this;
self.data = ko.observableArray([]);
var getDataUrl = <rest-api-url>
var fetchDataPayLoad = JSON.stringify(<json_data>);
self.fetchData = function(fetchDataPayLoad, fetchDataCallBack) {
$.ajax({
url: getDataUrl,
data: fetchDataPayLoad,
type: 'POST',
contentType: 'application/json',
success: fetchDataCallBack,
error: function (jqXHR, textStatus, errorThrown) {
console.log('Error during fetch');
}
});
};
function fetchDataCallBack(fetchedData){
fetchedData.hits.hits.forEach(function(e){
var value1 = e._id;
value2 = e._value;
value3 = e.name;
value4 = e.testdata;
self.data.push({
prop1: value1,
prop2: value2,
prop3: value3,
prop4: value4
});
});
});
};
var fetchDataRun = this.fetchData(fetchDataPayLoad, fetchDataCallBack);
console.log(self.data());
}
return new CustomerViewModel();
}
);
当我尝试检查observableArray的长度始终为0时,以及当我在控制台上打印如下所示的相同数据时,
>[]
当我展开时,
>0: {prop1: "value11", prop2: "value12", prop3: "value13", prop4: "value14"}
>1: {prop1: "value21", prop2: "value22", prop3: "value23", prop4: "value24"}
不确定在这里发生了什么错误/遗漏,我可以知道如何访问observableArray元素吗?
答案 0 :(得分:3)
更改console.log
的位置。
function fetchDataCallBack(fetchedData){
fetchedData.hits.hits.forEach(function(e){
var value1 = e._id;
value2 = e._value;
value3 = e.name;
value4 = e.testdata;
self.data.push({
prop1: value1,
prop2: value2,
prop3: value3,
prop4: value4
});
});
console.log(self.data());
});
您的Ajax调用是异步的,这意味着仅在调用完成后才执行回调函数。当前,您正在使用console.log
,而Ajax调用仍在后台运行,因此显示为空。有关直观说明,请参见here。